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相关概念视频

Design Example: Sustainability in Concrete Building01:26

Design Example: Sustainability in Concrete Building

191
As the construction industry moves towards more eco-friendly practices, concrete's adaptability and its ability to incorporate sustainable features make it a key material in the drive towards greener building solutions.
There are multiple approaches to achieve sustainability in a commercial concrete building. For instance, construct a concrete parking area under the building, utilizing pervious concrete paver blocks in open areas to facilitate rainwater collection through an underground...
191
Portland Cement01:21

Portland Cement

254
Portland cement is the essential binding ingredient in concrete, made from finely ground materials including lime, iron, silica, and alumina. Lime is derived primarily from limestone, marble, marl, seashells, and clays, which also supply iron and alumina, while silica is sourced from sand, chalk, and bauxite. Contemporary manufacturing of Portland cement is a significant source of carbon dioxide emissions, prompting research into reducing its content in concrete through alternative...
254
Accelerated Curing of Concrete01:25

Accelerated Curing of Concrete

187
Accelerating concrete curing is achieved by applying heat and additional moisture. This process accelerates the hydration of the cement, resulting in an earlier strength gain in the concrete. Steam curing is a method wherein the concrete products are either transported through a chamber on a conveyor belt or encased in plastic, allowing steam at atmospheric pressure to circulate freely around them. This process begins with a phase of moist curing that typically lasts between 3 to 5 hours, after...
187
Additives and Fillers in Concrete01:29

Additives and Fillers in Concrete

115
Additives and fillers are integral to enhancing the properties of concrete. Pozzolans and blast-furnace slag are additives or admixtures due to their reactions with calcium hydroxide released during cement hydration. Fillers, which are finely ground and similar in fineness to Portland cement, improve concrete attributes such as workability density, and reduce capillary bleeding or cracking. Some fillers possess hydraulic properties or participate in benign reactions within the cement paste.
The...
115
Concrete01:20

Concrete

385
Concrete is a vital construction material extensively used worldwide, primarily valued for its strength, durability, and versatility, which it provides for various structural designs. Concrete generally comprises ingredients like Portland cement, coarse gravel, fine sand, and water. Concrete can be mixed by simple hand methods or industrially at computer-controlled plants. The mixture consists of aggregates and a paste made from water and Portland cement. This paste coats the aggregates and,...
385
Mass Concreting01:22

Mass Concreting

90
Mass concreting refers to the process of placing large volumes of concrete, such as in gravity dams. The heat generated during the cement hydration process and differential cooling rates within the concrete mass can lead to a temperature gradient, which can result in thermal cracks in the concrete mass.
To reduce the risk of such cracking, the concrete mix may incorporate low-heat cement and pozzolans to reduce the temperature rise. Pre-cooled angular aggregates and water-reducing admixtures...
90

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相关实验视频

Updated: Jul 20, 2025

Production and Analysis of Sporosarcina pasteurii Biocement Bricks Using Custom 3D-Printed Molds for Unconfined Compression Tests
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全球混凝土生产脱碳的短期途径

Josefine A Olsson1, Sabbie A Miller2, Mark G Alexander3

  • 1Department of Civil and Environmental Engineering, University of California, Davis, Davis, CA, USA.

Nature communications
|July 29, 2023
PubMed
概括

有效的结构设计可以显著减少超过76%的水泥和混凝土生产的温室气体 (GHG) 排放. 这种方法降低了水泥需求,减少了对环境的影响,而不需要昂贵的新技术.

科学领域:

  • 土木和环境工程 土木和环境工程
  • 材料科学 材料科学 材料科学
  • 气候科学 气候科学

背景情况:

  • 城市人口的增长和基础设施的衰退增加了对混凝土的需求.
  • 水力水泥生产是全球温室气体 (GHG) 排放的主要来源.
  • 结构设计对混凝土温室气体减排的影响还没有得到充分研究.

研究的目的:

  • 通过制造和工程决策量化从水泥和混凝土生产中潜在的温室气体减排.
  • 评估这些决定对水泥需求和整体环境负担的影响.
  • 通过现有的混凝土设计灵活性来证明气候缓解的可行性.

主要方法:

  • 分析混凝土设计中的联合制造和工程决策.
  • 对潜在的温室气体减排和水泥需求的建模.
  • 除了温室气体排放之外,对环境效益的评估.

主要成果:

  • 来自水泥和混凝土生产的温室气体排放可能减少76%以上.
  • 相当于到2100年减少3.6 Gt CO2-eq的排放量.
  • 降低了高达65%的水泥需求,从而减少了环境负担.

更多相关视频

Two-way Valorization of Blast Furnace Slag: Synthesis of Precipitated Calcium Carbonate and Zeolitic Heavy Metal Adsorbent
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Monitoring Pedogenic Inorganic Carbon Accumulation Due to Weathering of Amended Silicate Minerals in Agricultural Soils.
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Production and Analysis of Sporosarcina pasteurii Biocement Bricks Using Custom 3D-Printed Molds for Unconfined Compression Tests
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Two-way Valorization of Blast Furnace Slag: Synthesis of Precipitated Calcium Carbonate and Zeolitic Heavy Metal Adsorbent
11:14

Two-way Valorization of Blast Furnace Slag: Synthesis of Precipitated Calcium Carbonate and Zeolitic Heavy Metal Adsorbent

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Monitoring Pedogenic Inorganic Carbon Accumulation Due to Weathering of Amended Silicate Minerals in Agricultural Soils.
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结论:

  • 优化的结构设计和制造选择为缓解气候变化提供了巨大的潜力.
  • 在当前的具体技术框架内,可以实现显著的温室气体减排.
  • 具体设计的灵活性可以在没有重大资本投资的情况下推动气候行动.